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Many of us have polarized sunglasses, but how does an optical polarizer actually block light? It has to do with the polarization of electromagnetic waves and the vibration of atoms in...
- 6 min
- 455.3K
- The Science Asylum
Jan 25, 2023 · The lenses in your polarized sunglasses are made of a material called a polarizer. I explain the atomic optics behind those materials._____...
- 56 sec
- 28.5K
- The Science Asylum
The useful glare-blocking properties of polarized sunglasses are well-known to just about anyone who goes outside. What isn't so well-known is how they reduc...
- 4 min
- 195.1K
- SciShow
Mar 14, 2023 · How Polarization Works. Polarized lenses are created using a technology known as polarization, an optical process that consists of arranging the filters in a very specific pattern. Polarized lenses work by blocking light waves that reflect off flat surfaces.
Put simply, polarised sunglasses are designed to reduce glare from light-reflecting surfaces like water, glass or snow – as well as protect your eyes from harmful UV rays. Standard sunglasses will protect your eyes from bright light, and in most cases, offer UV protection — but they aren’t always able to reduce glare.
Expect students to look through the sunglasses and a polaroid film and figure out that the film must be oriented horizontally because sunglasses are vertically polarized. By doing this, they learn that polarized sunglasses change the light intensity.
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How do polarized lenses work?
Polarising sunglasses pass vertically polarised light, but block the horizontal polarisation of the glare. In this way they make most of the scene 50% darker, but make the glare much much more than 50% darker, making for more comfortable viewing.
